moultrie



w. MOULTRIE.

Hot Air Furnace.

Patented Aug. 25, 18 57.

UNITED STATES PATENT OFFICE.

\VILLIAM MOULTRIE, OF NEW YORK, N. Y.

WATER VESSEL FOR IMPABT'ING HUMIDITY T0 HOT AIR AND VAPOR-DRAFT TO THE GRATIS-BARS 0F HOT-AIR FURNACES.

Specification of Letters Patent No. 18,054, dated August 25, 1857.

through at its center. Fig. 3 is a horizontal j'section, cut through just above the grate bars.

Letter A represents the chamber of brick inclosing the apparatus. Letters B represents the openings from this chamber to the flues, for conducting the warm air to the various parts of the house.

Letter C (Fig. 2,) represents the body or fire chamber of the furnace.

Letter D represents the pipe for the escape of smoke to the chimney.

Letter E represents the door or entrance for the admission of fuel to the fire.

Letter F represents the ash-pit and G the door from the outer air leading thereto.

Letter I-I 1,) represents the door at the side leading to the interior of the furnace chamber.

Letter J represents a hollow chamber, next contiguous to the fire chamber, formed in the space existing between the projecting doors E and G.

Letter K represents a sliding register in the ash-pit door G for the admission of cold air to the grate bars. Letter L represents a similar register leading to the 1101- low chamber J for the admission of air thereto.

Letter M represent-s a hollow vessel or chamber in the interior, adjacent to the ash-pit and opposite in situation to the ashpit door for containing water (R) having a movable lid or cover (N) Fig. 2. Letter 0 represents an opening from this Vessel (M) to the ash-pit having a sliding register opening and shutting at pleasure. Letter P represents another adjustable opening from the interior of the furnace chamber to the water vessel Perforations or openings (Q) are also made in the roof of the projecting part of the ash-pit, leading from the hollow chamber (J) to the ashpit.

By opening the register L and shutting the register K, the only avenue for the admission of air to the grate bars, for the support of combustion, is through the hollow chamber J, and through the perforations (Q) in the ceiling of the projecting ash pit. The air in its descent becomes heated by contiguity and contact with the heated sides and interior of the chamber J, before its admission to the burning fuel. Its descent is indicated by the arrows (Fig. 2). To insure the certain heating of the air currents, the hollow chamber J may be filled with wire work or other equivalent metallic interstices, as shown in Figs. 2 and 3. The use of warm air for the support of combustion is well known and need not be further described.

My improvement more particularly relates to the application and employment of the water vessel M in the vicina e of the ash pit or fire chamber so that the water therein (B) may be heated, and vaporization produced thereby. The steam or vapor arising therefrom, is supplied to the grate bars through the register 0, for the better support of combustion. I make such vessel (M) with a lid or cover (N), removable at pleasure, for the better filling of the same with water. A pipe however may lead from said vessel to the outside of the furnace chamber, into and through which the required water may be poured. Immediately above the water level, and in the side of the ash pit, nextcontiguous to the vessel (M), I make the adjustable openings with a register (0), above referred to. Similar openings may lead from the vessel (M) to the interior of the furnace chamber, as shown by the register at P, so that the warm air of the furnace chamber may be admitted over the surface of the water, to the ash pit, conveying with its currents the steam or vapor generated by the water. By shutting the register (O) and allowing the register P. to remain open, or by removing the lid N, the water vessel (M) becomes useful as a water pan for communicating moisture to the heated air within the furnace chamber, thus rendering it more wholesome for distribution throughout the house.

I do not claim the placing of a water vessel within a furnace chamber simply for tially as hereinbefore described, in connection with furnaces and other heating apparatus.

WM. MOULTRIE.

In presence of THos. PALMER, JOHN BEAVER.

both of said objects are attained, substan- 10 

